WebGL GL_RGB emulation to support IOSurfaces on Mac.

third_party/WebKit/Source/modules/webgl/WebGLTexture.h

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 23 matching lines @@
     DEFINE_WRAPPERTYPEINFO();
 public:
     ~WebGLTexture() override;
 
     static WebGLTexture* create(WebGLRenderingContextBase*);
 
     void setTarget(GLenum);
 
     GLenum getTarget() const { return m_target; }
 
+    void setColorFormat(GLenum);
+
+    GLenum getColorFormat() const { return m_colorFormat; }
+
     static GLenum getValidFormatForInternalFormat(GLenum);
 
     bool hasEverBeenBound() const { return object() && m_target; }
 
     static GLint computeLevelCount(GLsizei width, GLsizei height, GLsizei depth);
 
 private:
     explicit WebGLTexture(WebGLRenderingContextBase*);
 
     void deleteObjectImpl(gpu::gles2::GLES2Interface*) override;
 
     bool isTexture() const override { return true; }
 
     int mapTargetToIndex(GLenum) const;
 
+    GLenum m_colorFormat;
     GLenum m_target;
 };
 
 } // namespace blink
 
 #endif // WebGLTexture_h